Method for extracting humus from pig manure maize straw compost
A corn stalk composting and humus technology, which is applied in fertilization devices, fertilizer mixtures, organic chemistry, etc., can solve the problems of unsatisfactory extraction effects and achieve high extraction efficiency
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[0017] Example 1
[0018] 1. Add 100mL of extraction solution to 10g of compost sample, the extraction solution is 0.1M NaOH and 0.1M Na 4 P 2 O 7 Mixed at a volume ratio of 1:1, shaken at room temperature for 2 hours, then centrifuged at 5000 rpm for 20 minutes, extracted the supernatant, and removed the filter residue.
[0019] 2. Acidify the supernatant to pH=1 with 6M hydrochloric acid, stir it thoroughly, stand still at room temperature overnight, then centrifuge at 5000 rpm for 20 minutes, collect the supernatant and the precipitate respectively, and compare the supernatant. The supernatant was freeze-dried to obtain 0.32 g of FA, and the precipitate was freeze-dried to obtain 1.14 g of HA.
Example Embodiment
[0020] Example 2
[0021] 1. Add 120mL of extract to 10g of compost sample, the extract is 0.1M NaOH and 0.1M Na 4 P 2 O 7 Mixed in a volume ratio of 1:1, shaken at room temperature for 3 hours, then centrifuged at 4000 rpm for 30 minutes, extracted the supernatant, and removed the filter residue.
[0022] 2. The supernatant was acidified with 6M hydrochloric acid to pH=1, and it was fully stirred, left at room temperature overnight, and then centrifuged at 4000 rpm for 30 minutes, and the supernatant and the precipitate were collected respectively. It was freeze-dried to obtain 0.25g FA, and the precipitate was freeze-dried to obtain 1.10g of HA.
Example Embodiment
[0023] Example 3
[0024] 1. Add 150L of extract to 10g of compost sample, the extract is 0.1M NaOH and 0.1M Na 4 P 2 O 7 Mixed at a volume ratio of 1:1, shaken at room temperature for 4 hours, then centrifuged at 6000 rpm for 15 minutes, extracted the supernatant, and removed the filter residue.
[0025] 2. Acidify the supernatant to pH=1 with 6M sulfuric acid, stir it well, stand still at room temperature overnight, and then centrifuge at 6000 rpm for 15 minutes, collect the supernatant and the precipitate, respectively, on the supernatant. The supernatant was freeze-dried to obtain 0.3 g of FA, and the precipitate was freeze-dried to obtain 1.0 g of HA.
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